| Edition |
1st ed. |
| Description |
1 online resource (x, 395 pages) : illustrations |
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text txt rdacontent |
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computer c rdamedia |
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online resource cr rdacarrier |
| Series |
Developments in Quaternary sciences ; 10 |
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Developments in Quaternary science ; 10.
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| Summary |
West Africa and the eastern Atlantic stretching from Mauritania in the north to Namibia in the south offer a large latitudinal stretch incorporating nearly symmetrical climatic gradients from the Equator. On the time scale of Quaternary Glacial and Interglacial cycles, today, we possess well-documented and recently published marine sedimentary records showing changes in oceanic and atmospheric circulations and terrestrial fluxes. Deep-sea sediment records contain a wide range of palaeoenvironmental indicators like oxygen and carbon isotopes, alkenones, foraminiferal and other planktonic assemblages over time periods up to and greater than 125,000 years. These are signals of temperature and circulation shifts and allow Interglacial and Glacial comparisons on a regional and inter-hemispheric scale. However, this effort to synthesize the existing knowledge cannot yet aspire to a global modelling. Linking with terrestrial records, albeit spatially patchy and generally lacking a firm chronology, this book points to shorter time scale chronologies from lakes, marshes and river deposits. Diverse and not very well known literature, both French and English, is reported here. Lastly, the book records recent knowledge of the first steps of human occupation of frequently hostile environments and considers the environmental impact of ancient and modern societies. * Covers the recent studies about marine Quaternary environments off West Africa, as well as continental Quaternary environments of tropical and sub-tropical West Africa (over 10,000 to 100,000 years) * Compares the parallel between palaeoenvironmental trends according to latitudinal gradients. |
| Contents |
Part A. Present Terrestrial Environments. 1. Geological and morphological setting. 2. Climatic mechanisms and climates. 3. Present vegetation of tropical West Africa. 4. Present fluxes of suspended and dissolved matter in rivers. Part B. Present Oceanic environment. 1. Atlantic ocean circulation -- Leakage with climate fluctuations. 2. Suspended matter and particle fluxes in the Eastern Gulf of Guinea. 3. Present oceanic deposition. Part C. 1. Changes deduced from stable oxygen and carbon isotopes and from alkenones in deep sea sediments. 2. Changed deduced from markers of surface ocean productivity. 3. Changes deduced from pollen. 4. Changed deduced from atmospheric dust transport. 5. Changed deduced from deposition processes. Part D. 1. Sea level fluctuation on the Atlantic coast of Africa during the past 125,000. 2. Successive continental shelf sedimentation related to climatic and sea level changes. Part E. Terrestrial evidence of late quaternary changes. 1. Records in lake deposits. 2. Pedological and geomorphological processes and their palaeoenvironmental significance. Part F. Climatic evolution and human presence. 1. Lithic artifact dating and environmental context. 2. Landscape and human development implication. 3. Anthropic action and global change. |
| Bibliography |
Includes bibliographical references (pages 359-386) and index. |
| Contents |
pt. 1. Present terrestrial environments: Geological and morphological setting -- Atmospheric circulation, climatic mechanisms and African climate -- Characteristics of the soils and present day vegetation of tropical West Africa -- Present fluxes of suspended and dissolved matter in rivers -- Present aeolian dust transport -- pt. 2. Present oceanic environments: Atlantic Ocean circulation : leakage with climate fluctuations -- Suspended matter and particle fluxes in the eastern Atlantic -- Present oceanic deposition -- pt. 3. Deep-sea record of Late Quaternary change: Changes deduced from foraminiferal assemblages, their isotopic composition and from alkenones -- Changes deduced from other plantonic components -- An attempt to model glacial-Holocene contrasts in surface waters of the eastern Atlantic -- Changes deduced from pollen -- Changes deduced from atmospheric dust transport -- Changes deduced from carbonate depositional system -- Changes deduced from other biogenic components -- Changes deduced from clay mineral assemblages -- Sediment accumulation rates and fluxes -- pt. 4. Land-ocean boundary : continental shelf and shoreline records of Late Quaternary changes: Sea level fluctuation on the Atlantic margin of Africa during the past 125,000 years -- Successive continental shelf sedimentation related to climatic and sea level changes -- Neoformation processed (green clay grains, phosphate, and carbonate) -- pt. 5. Terrestrial evidence of Late Quaternary changes: Records in lake deposits -- Inferences from coastal peats, soils, alluvial deposits and other terrestrial evidences -- pt. 6. Climatic evolution and human presence: Lithic artifact dating and environmental context -- Landscape and recent human development implications -- Anthropogenic action and global change. |
| Note |
Print version record. |
| Language |
English. |
| Subject |
Paleoclimatology -- Africa, West.
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Paleoclimatology -- Holocene.
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Paleogeography -- Africa, West.
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Paleogeography -- Holocene.
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Paleoceanography -- Holocene.
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Paleoceanography -- Africa, West.
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Geology, Stratigraphic -- Holocene.
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Geology -- Africa, West.
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Paléoclimatologie -- Afrique occidentale.
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Paléoclimatologie -- Holocène.
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Paléogéographie -- Afrique occidentale.
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Paléogéographie -- Holocène.
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Paléo-océanographie -- Holocène.
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Paléo-océanographie -- Afrique occidentale.
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Stratigraphie -- Holocène.
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Géologie -- Afrique occidentale.
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SCIENCE -- Earth Sciences -- Oceanography.
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NATURE -- Ecosystems & Habitats -- Oceans & Seas.
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Geology
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Geology, Stratigraphic
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Holocene Geologic Period
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Paleoceanography
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Paleoclimatology
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Paleogeography
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West Africa
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Paläogeografie
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Paläoklima
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Paläoozeanographie
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Quartär
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Umweltveränderung
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Westafrika
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| Chronological Term |
From 10 thousand years ago
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| Other Form: |
Print version: Giresse, P. Tropical and sub-tropical West Africa. 1st ed. Amsterdam, The Netherlands : Elsevier, 2008 9780444529848 (OCoLC)166379677 |
| ISBN |
9780080556031 (ebook) |
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0080556035 (ebook) |
|
1281096288 |
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9781281096289 |
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9786611096281 |
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6611096280 |
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9780444529848 |
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0444529845 |
| Standard No. |
AU@ 000048130133 |
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CHDSB 005985729 |
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DEBBG BV039829728 |
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DEBBG BV042306862 |
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DEBSZ 405318472 |
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DEBSZ 482440260 |
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NZ1 12541592 |
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UKMGB 017585181 |
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